ES|QL SAMPLE aggregation function

docs/changelog/127629.yaml

@@ -0,0 +1,5 @@
+pr: 127629
+summary: ES|QL SAMPLE aggregation function
+area: Machine Learning
+type: feature
+issues: []

server/src/main/java/org/elasticsearch/common/hash/MurmurHash3.java

@@ -81,7 +81,7 @@ static class IntermediateResult {
     private static long C1 = 0x87c37b91114253d5L;
     private static long C2 = 0x4cf5ad432745937fL;
 
-    protected static long fmix(long k) {
+    public static long fmix(long k) {
         k ^= k >>> 33;
         k *= 0xff51afd7ed558ccdL;
         k ^= k >>> 33;